<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>float-demo</title>
    <link rel="stylesheet" href="css/float-demo.css">
</head>
<body>
    <div class="topbar">
        <div class="w headbar">
            <div class="leftbar"></div>
            <div class="rightbar"></div>
        </div>
        <div class="w main">
            <div class="mainleft">
                <div class="fl1"></div>
                <div class="fl2"></div>
                <div class="fl3"></div>
            </div>
            <div class="mainright"></div>
        </div>
    </div>
</body>
</html>